...thin cotton line you rub the chalk on...
No it's a thinner line not braided you hold a lump of chalk in your hand and pull the line through it as you walk backwardsjust standard chalk line ??? here https://www.google.co.uk/search?sou...BB2d3cy13aXo&sclient=psy-ab#spf=1603730038352
what are you using it for that has to be thinNo it's a thinner line not braided you hold a lump of chalk in your hand and pull the line through it as you walk backwards